Crossing grading a GAI

I was just wondering if anyone knew about cross grading. I plan on going to the show in Chicago next month and want to bring a signed card I have in a GAI holder and want to put it in a PSA one. Does anybody know if they will do it on-site and around the cost? thanks
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Comments
Have you looked at the upcoming shows page?
Steve
Hi, sorry for asking if you looked at the website because had you, you lol would have not asked for help.
Anyway, it appears that you might be able too because:
Chicago Sun Times 11/19/2010
11/21/2010 Donald E. Stephens Convention Center Rosemont IL United States of America
Comments: Customer Service Representatives will be available to answer questions and accept submissions for all levels of service. PSA will offer on-site grading and PSA/DNA autograph experts will be available to authenticate your previously signed autographs on-site at the PSA Booth.
Now, I'm not exactly sure if you have to submit it raw or if you can in the case.
Sorry for the mixup on my part earlier. I think I answered what I knew and than realized the show schedule.
Steve